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J. B. CLARK.

Whiffltre'e Plate.

No. 86,811. Patented Feb. '9, 1869-.

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JAMES B. CLARK, OF MERI DE N, CONNECTICUT. Letters Patent N0..86,811, dated February 9, 1869; a ntedatetl February 1, 1869.

IMPROVEMENT 1m WHIIFLE-TREE PLATES.

The Schedule referred to in these Letters Patent and making part ofthe same;

To all whomtt may concern.-

Be a knownthat 1, JAMES B. CLARK, of Meriden, in-the county of New Haven, and State of Connecticut, have invented a new Improvement in \Vhifl'le- Tree Plate; and I do hereby declare the following, when taken in connection with the accompal'lying drawings, and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said ch-awings constitute partof this specification, and represent,- int Figure 1 a perspective view of the plate complete;

Figure 2, a perspective view of one part;

Figure 3, a longitudinal section. of the same; and in Figure 4, a longitudinal section of the two parts united.

This invention relates to an improvement in the article of manufacture known to the trade as whifiietree irons; that is, the plate which lies between the whiffle-tree and cross-bars incarriages, and forms the joint upon which the whiflie-tree vibrates, the object of the invention being to produce a strong, substantial, and cheap plate; and to this end;

The invention consists in casting, first, one part of the plate with a'circular opening through the centre, of larger diameter upon one side than the other; then placing the part so cast into a flask, and casting the other part on to the first, so that the central part of the last extends into and fills the circular space left in the first. 4

In order to the clear understanding of my invention, I will fully describe the same, as illustrated in the accompanying drawings.

A, the one part, is cast with ears, for the purpose of securing it to the whiifle-tree or cross-bars, and through the centre a circular recess, B, is formed, as seen in fig. 2, which of larger diameter upon one surface than the other, and the part finished in the usual manner for finishing small castings, (as by tumbling, '&c.)

The other part, 6, is moulded in sand in the usual manner, and the part A put into the flask, so' as to form a part of the mould, and in such relative position to the part C that, when the metal is poured into the v flask to form the part- O,.it will flow into the recess D,

in the part A, as denoted in fig. 4, forming, as it were,

a head in the said recess, to secure the two parts to- What I claim as new and useful, and desire to se- I cure by Letters Patent, is

A whiffle-tree plate, as an improved article of man'- ufactnre, in which the two parts are united together by the process of casting, substantially as set forth.

JAMES B. CLARK.

Witnesses:

A. J. TIBBrrs, J. H. SHUMWAY. 

